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The function of Grid Diagnosis is to confirm the fault device after fault occur in Grid and evaluate the action of circuit breaker and protection which in the region of fault. As a intelligence system used in Grid dispatching center, we must design a suitable knowledge frame for Grid Diagnosis. In this paper, we introduce a knowledge frame which is used to LAN Zhou and Ordos Local Grid Diagnosis system...
In order to find hidden cascading outage caused by protective relays, methods for modeling, simulating and online setting-checking of protective relays are studied here. A user-defined model is proposed based on a kind of scrip language and concept of component firstly. Based on that, the power system simulator in a commercial dispatcher training simulator is embedded with protective relay simulator,...
This paper presents the results of simulating and evaluating an under-voltage protection scheme, which takes stalled air-conditioner (a/c) units offline so that the slow voltage recovery phenomena can be prevented in areas heavily loaded with AC motors during summer peak periods. First, a three-feeder test-bed was used to quantify the effectiveness of the protection scheme and the sensitivity of the...
This paper presents the expert technology of the analysis and changes of a switching condition of high-voltage power grid. It is constructed on philosophy of matched multilevel simulation of intellectual processes and knowledge which able to decide a problems of high complexity.
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